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What is the formula for velocity gradient (du/dz) in terms of force (F), area of contact (

Options

  1. A, and the proportionality constant (η)? A) du/dz = F / A × η
  2. Bdu/dz = A / F × η
  3. Cdu/dz = F × A / η
  4. Ddu/dz = F / A / η

Correct answer

A. , and the proportionality constant (η)? A) du/dz = F / A × η

Step-by-step solution

The formula for velocity gradient (du/dz) is du/dz = F / (A × η), as per the equation provided.

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